Featured Research

from universities, journals, and other organizations

Shrinking Magnetic Storage Media Down To The Nanoscale

Date:
March 20, 2006
Source:
DOE/Brookhaven National Laboratory
Summary:
In the world of electronic and magnetic devices, the goal is to get smaller. "The smaller space one bit of information can occupy, the more data you can get into a device and the faster it can operate," says Yimei Zhu of Brookhaven National Laboratory. Zhu will present his work assessing the properties of materials that may lead to magneto-electronic devices on the scale of billionths of a meter at the American Physical Society meeting in Baltimore, Maryland.

Pattern of magnetic squares showing two distinct polarities in black and white.
Credit: Image courtesy of DOE/Brookhaven National Laboratory

In the world of electronic and magnetic devices, the goal is to get smaller. "The smaller space one bit of information can occupy, the more data you can get into a device and the faster it can operate," says Yimei Zhu, a senior scientist at the U.S. Department of Energy's Brookhaven National Laboratory. Zhu will present his work assessing the properties of materials that may lead to magneto-electronic devices on the scale of billionths of a meter at the American Physical Society meeting in Baltimore, Maryland, on Monday, March 13, 2006.

Related Articles


Zhu's group has fabricated patterned magnetic films by depositing magnetic materials such as Permalloy and cobalt in patterns of dots, squares, or ellipses across a surface of nonmagnetic substrates such as carbon or silicon nitride. With each dot measuring about 100 nanometers, or billionths of a meter across, these materials could serve as building blocks for new nanoscale magneto-electronic devices and data storage media.

"For digital communication and data storage applications, such as magnetic recording media, you need two stable states to encode the 'ones' and 'zeros' of digital information," Zhu explains. In his array of magnetic dots, the two states are the two distinct spin orientations, or polarities, of the dots' internal magnetic fields.

Using a state-of-the-art, field-emission transmission electron microscope (TEM) equipped with a custom-made objective lens -- the only one like it in the world -- Zhu's group can probe the magnetic properties (including spin orientation) of each dot, and map how the spins "flip" in response to an external magnetic field -- or other variables such as temperature, environment, and crystal defects. The technique uses an extremely coherent source of electrons to produce images with unprecedented quality at high resolution in which the amplitude and direction of local magnetization can be clearly visualized.

"What we are looking for is two very stable states with a well-defined switching mechanism," Zhu says. Such a medium could be encoded with digital data by switching the spins from "up" to "down"-- or clockwise to counterclockwise -- at will, without interference from other variables.

"In order to make these materials into useful, practical magnetic building blocks, we really have to understand this switching, or reversal, mechanism," Zhu says.

The precise measurements allow the scientists to compare experimental observations with calculations to validate various theoretical models.

Once the researchers understand the mechanism, scientists may be able to scale the materials down even smaller, perhaps to the molecular scale.

Zhu's talk will take place on Monday, March 13, 2006 at 2:54 p.m. in Room 319 of the Baltimore Convention Center. This research was funded by the Office of Basic Energy Sciences within the U.S. Department of Energy's Office of Science.



Story Source:

The above story is based on materials provided by DOE/Brookhaven National Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

DOE/Brookhaven National Laboratory. "Shrinking Magnetic Storage Media Down To The Nanoscale." ScienceDaily. ScienceDaily, 20 March 2006. <www.sciencedaily.com/releases/2006/03/060320085033.htm>.
DOE/Brookhaven National Laboratory. (2006, March 20). Shrinking Magnetic Storage Media Down To The Nanoscale. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2006/03/060320085033.htm
DOE/Brookhaven National Laboratory. "Shrinking Magnetic Storage Media Down To The Nanoscale." ScienceDaily. www.sciencedaily.com/releases/2006/03/060320085033.htm (accessed October 25, 2014).

Share This



More Matter & Energy News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

IKEA Desk Converts From Standing to Sitting With One Button

IKEA Desk Converts From Standing to Sitting With One Button

Buzz60 (Oct. 24, 2014) IKEA is out with a new convertible desk that can convert from a sitting desk to a standing one with just the push of a button. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com
Ebola Protective Suits Being Made in China

Ebola Protective Suits Being Made in China

AFP (Oct. 24, 2014) A factory in China is busy making Ebola protective suits for healthcare workers and others fighting the spread of the virus. Duration: 00:38 Video provided by AFP
Powered by NewsLook.com
Real-Life Transformer Robot Walks, Then Folds Into a Car

Real-Life Transformer Robot Walks, Then Folds Into a Car

Buzz60 (Oct. 24, 2014) Brave Robotics and Asratec teamed with original Transformers toy company Tomy to create a functional 5-foot-tall humanoid robot that can march and fold itself into a 3-foot-long sports car. Jen Markham has the story. Video provided by Buzz60
Powered by NewsLook.com
Police Testing New Gunfire Tracking Technology

Police Testing New Gunfire Tracking Technology

AP (Oct. 24, 2014) A California-based startup has designed new law enforcement technology that aims to automatically alert dispatch when an officer's gun is unholstered and fired. Two law enforcement agencies are currently testing the technology. (Oct. 24) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins